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`(No MQdeL.) 2 Sheets-Sheet 1. Z. B. GOES 8v G. W. MILLER.

GEAR CUTTING MACHINE.

No. 310,796. Patented Jan.13,'1885.

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(No Model.) 2 SheetsSheet 24 Z. B. GOES & G. W. MILLER. GEAR CUTTING MACHINE.

No. 310,796. Patented Jan; 13, 1885.

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ZORESTER B. COES, OF HYDE PARK, MASSACHUSETTS, AND GEORGE W. MILLER, OF VVOONSOCKET, RHODE ISLAND, ASSIGNORS TO AMOS H. BRAINARD, OF HYDE PARK, MASSACHUSETTS.

GEAR-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 310,796, dated January 13, 1885 Application filed July 11, 1884. (No model.)

To all whom t may concern:

Be it known that we, Zonns'rnn B. Cons, a citizen of the United States, residing at Hyde Park, in the county of Norfolk and State of Massachusetts, and GEORGE W. MILLER, a

citizen ofthe United States, residing at Woonsocket, in the county ot' Providence and State of Rhode Island, have jointly invented certain new and useful Improvements in Gear- Io Cutting Machines; and We do hereby declare that the same are fully described in the following specification and illustrated in the accompanying drawings.

This invention relates to improvements in I5 gear-cutting machines of that class in which the functions are entirely automatic; and it consists, essentially,-of means for driving and unlatching the dividing mechanism.

The mechanism for operating the various A `2o other,parts of the machine are not subjectmatter in the present application, but are contained in another application of A. H. Brainard and Z. B. Goes, now pending in the United States Patent Office.

The improvements are shown in the drawings, on which Figure l represents a general side view of the improved machine. Fig. 2 represents a detail rear view of the worm dividing-wheel, its worm-shaft, and adjustable 3c bracket, with a sectional view of the mechanism for operating the change-gears by which the movement of the dividing-wheel is corr trolled. Figs. 3 and 4 represent, respectively, enlarged front and `side views of the unlatching mechanism shown in Fig. 1. Fig. 5 represents a sectional view of the mechanism for controlling the belt by which the dividing mechanism is operated, such view being an enlarged section on the line X Y. (Shown in 4o Fig. 1.) f

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

a is the standard or frame of the machine, having in its upper end a bearing, b, for the spindle c, to the forward end of which is secured the wheel to be cut. l n To the rear end of the spindle c is fastened the Worm-whcel d, protected by the guard e.

f is the worin, andf the wornrshaft, by 5o means of which the worm-wheel is operated.

g is a shaft mounted in the same block or bracket F as the shaftf, and to one end of which is secured the disk 7i, while on the other end is placed the change-gearing connecting with the worm-shaftf.

ZL is a gear-disk mounted loosely on the shaft g, and secured to the disk h by bolts h and T-slot h, as shown in Fig. 2. rThe geardisk has a notch, hiv, Fig. 3, eut in one side to receive the latch j. The disk h is graduated on its periphery. This construction of disks allows the shaftg to be moved when the latchj is seated in notch hi" by simply loosening the bolts 7L, and is used for obtaining the 6 5 set over7 required in bevel-gear cutting. This latter construction is the subject-matter of Patent N o. 255,409, dated March 2S, 1882, and issued to A. H. Brainard.

m is a pulley, having on its hub a pinion, m, and mounted loosely on a stud, a, which is secured to the worm-bracket F. m engages with h. m is also a pulley mounted loosely on-the stud a. The latch j is mountedin a block, j', which is secured to the main frame of the machine.

7s is a lever mounted loosely on a stud, 76', which is secured to the block j.

7c is pivoted to the latch j by a pin, j. (Shown in Figs. 3 and 4.)

j is a spring for operating the latch j.

k is a cam, which is secured in place on the stud 7c by a set-screw, h".

Zis a disk mounted loosely on the hub of the lever 7c, and operated bya ribbon, Z", which is in turn moved by thebackward movement of the slide A, (shown in Fig. 1,) which carries the cutter for cutting the gear-blank.

o is a pawl pivoted loosely to the disk Z by a screw, o', and kept in its seat on the lever 7c by a spring, o. (Shown in Fig. 3.)

0 is a roll pivoted loosely on the pawl o, and arranged to engage with the xed cam k".

`oiv is a spring which engages with a stud, o", secured to the disk Z. (Shown in Fig. 3.)

p is a sleeve carrying the studs p p', and mounted loosely on a stud,p, (shown in Fig. 5,) which is secured to the main frame of the machine. The sleeve p is adjustable on the stud p by a screw, p, which is tapped into it, and operated bya milled knob, pil. (Shown in Fig. 3.)

On the studs p are mounted loosely the respective flanged guide-rolls rr, between which.

runs the driving-belt s.

The operation of these parts is as follows: The sleeve p is adjusted on the stud p" by manipulating the hand-knob plv until the rolls r r have crowded the belt s over on the pulley m sufficiently to drive the changegear mechanism, when the latch j shall be removed. This in practice requires but a small fraction of the width of the belt, the remainder running on the loose pulley m".

The latch j is operated in the following manner After a cutter has been passed through the gear-blank to be cut, and While the cutter is returning, motion is communicated to the ribbon Z,which in turn moves the disk Z. This communicates motion to the lever k by means of the pawl 0 engaging with it, which withdraws the latch j from its seat in h', thus permitting the belts to drive the' change gear mechanism and revolve the worm-wheel d. As soon, however, as the latch j has left its seat inh further movement is arrested by reason of the pawl o being tripped from its connection with k by means of the cam lo" and roll 0. The latch j is at once returned against the periphery of the disk 7L by the influence of the spring j, and on the completion of a revolution of the disk h the latch j is seated again into the recess on the periphery of disk h. On the next forward movement of the cutter carrying slide A the disk l is returned to its former position by the spring oi" bearing against the stud ov, and the pawl o is again engaged with the lever 7c by the influence of the spring o, when the roll 0 shall have passed off the cam k.

Having thus fully described the nature, construction, and operation of our invention, We wish to secure by Letters Patent and claiml. A friction-gearing for driving the dividing mechanism of agear-cutting machine, composed of a tight and loose pulley, and means, substantially as described, for constantly retaining a portion of the driving-belt on the loose pulley,and adjusting such portion of the belt only upon the tight pulley as may be required for operating the dividing mechanism, as herein set forth and described.

2. In a gear-cutting machine, the adjustable sleeve p, carrying the rolls r 1", for regulating width of belt necessary to drive the dividing mechanism, substantially as set forth.

3. In combination, the disk Z,paw1 0, spring o, roll 0', cam 7c, and the lever k, as and for the purpose set forth.

In testimony whereof we have affixed our signatures in presence of two witnesses.

ZORESTEE B. GOES. GEORGE W. MILLER. Witnesses:

L. WV. BALLOU, H. L. BALLoU. 

